I was being hyperbolic about the film's structure, but I broadly think that my description is accurate. Obviously, things happen during the earlier parts of the film, but overall I found it to be cold and mechanical. My feeling watching it was that the film is more interested in its structural complexity than in its dramatic content, with the result that its characters feel like the component parts of a machine rather than genuine characters. I do find that interesting on one level, but I also think that it's kind of dull. Particularly as it isn't clear that Nolan has anything to say about the ideas around the relation between future and present that he's engaging with - hence the ending focusing upon the undeveloped relationship between the protagonist and Kat. Honestly, you can read the protagonist as a kind of author insert (after all, he's the person who put the events of the film into action and devised the overall plot just as a director does) and the film as ultimately just about how smart Nolan is for coming up with its structure.